Norm

NPR-CEN/TS 16498:2013 en

Verven en vernissen - Verf en verfsystemen voor hout voor buitentoepassing - Beoordeling van tannine verkleuring

49,30

Over deze norm

Status Definitief
Aantal pagina's 11
Commissie Verfwaren
Gepubliceerd op 01-11-2013
Taal Engels
This Technical Specification specifies a test method for assessing the discoloration of coatings on wood by tannin staining due to wood extractives. The method uses an extract from Merbau wood as an indicator. Bleeding of wood extractives is assessed at two specified stages firstly after coating application and secondly after cyclic climate exposure. A qualification of colour differences that can be attributed to three different causes, bleeding of extractives, low opacity of the coating film or general yellowing in climate exposure, is included. This document does not specify acceptance values for colour differences that can be tolerated and it is not applicable to staining caused by knots for which there is a different test method (e. g. CEN/TS 16359).

Details

ICS-code 87.040
Nederlandse titel Verven en vernissen - Verf en verfsystemen voor hout voor buitentoepassing - Beoordeling van tannine verkleuring
Engelse titel Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining

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